Possibly helpful:
Starting Out: d-Pawn Attacks by Richard Palliser (2008)
https://web.archive.org/web/20140626165651/http://www.chesscafe.com/text/hansen118.pdf
Zuke 'Em, The Colle-Zukertort Revolutionized by David Rudel (2009)
https://web.archive.org/web/20140627053117/http://www.chesscafe.com/text/hansen130.pdf
The Zukertort System: A Guide for White and Black by Grigory Bogdanovich (2010)
https://web.archive.org/web/20140627131000/http://www.chesscafe.com/text/hansen143.pdf
A Killer Chess Opening Repertoire by Aaron Summerscale & Sverre Johnsen (2010)
https://web.archive.org/web/20140627030157/http://www.chesscafe.com/text/hansen133.pdf
The Moment of Zuke by Dave Rudel (2009)
https://web.archive.org/web/20140627030157/http://www.chesscafe.com/text/hansen133.pdf
Starting Out: The Colle by Richard Palliser (2007)
https://web.archive.org/web/20140627040050/http://www.chesscafe.com/text/hansen103.pdf
The Colle: Move by Move by Cyrus Lakdawala (2013)
https://web.archive.org/web/20140627110453/http://www.chesscafe.com/text/hansen169.pdf
First Steps: Colle and London Systems by Cyrus Lakdawala (2016)
https://www.chess.com/article/view/how-to-understand-openings
here is an opening that i came across and have had great success with. i think it is the only queens-pawn opening that we beginners can understand positionally.
here is the perfect example of a position that can arise in this opening
vastly better for white